Stripper



hine 29 Q1926] STRIPPER Filed March 10; 1925 3 Sheets-sheaf, 3

Patented June 29, 1926,

ED sures CHARLES s. nivrnn'r, rnonra iim i-nors.

s'TRIrrER.

Application fired March 10', ea. --sa-s1ao.=1i,'51s.

My invention relates to machines which are used in conjunction withtamping ma; chines in the formation of concrete blocks and similarproducts and in which the machine of my present invention is used toraise or force the product outot'fthe mold after it has been tamped orformed therein.

Oneobject of my invention is the provision of a stripper which is p'oweroperated and "automatic in its action 'to the extent that when it is setin motion, it completes its stroke and then automatically disei'igagesits driving mechanism and remains at rest until a subsequent operation.

Another object of my invention is the proper protection and lubricationof the mechanism. 1

Another object of my invention is the provision of a suitable clutch incombination with a yielding de'vice'for maintaining its engagementtocomplete a stroke.

Other objects of my invention will appear and be describ'ed'in thespecification.

The novelty of my invention Willbe hereinafter more fully set forthand-specifically pointed out in the claims.

In the accompanying drawings z- Fig. v1 sheet 1 isa central sectionalside elevation of a machine embodying my invention. I g I I Fig. 2 sheet2 is "a sectional end view of F i'g. 1, the section being taken adjacentthe right end of the'ma'chineand looking to the left.

3 sheet 3 is a'sectional plan view of Fig. 1, the section being takenabout midway between the top and bottom of the machine. v The samenumerals of reference are used to indicate identical parts'in all thefigures.

As illustrating one 'form of machine embodying my present invention,though without limiting myself to the details construction orarrangement ofip arts shown in the drawings and description herein,while availing mysel f'oi all variations, modificat o stan -eq iv t'wh-" bh l yj' e lzw 'fhi the -S Io e of lthe appended claims, 1 1 7 havesh wn-am *ising abase 1, upon wln h a'nairof side Ynb'ersQ a secured, isbe n a "b e mounted and. pomr'ris' ifge ha F somewhat inner-(sen6f'afgfiE1EniTwheh carries "the cores '4, the side plates the of baseland are se'euredth'ereon as clearly shown in Figs. 2 and 3, thesebearings'being shown in section in Fig. '1. The shaft 10 carries a crank12 ateac'h end thereof, these cranks beingdup'licates and arranged inline and suitably keyed in position to insure their uniform rotationwith the shaft 10.

As shown more clearly in Fig. 1 shaft 10 is enlarged as at l3 and theclutch member 14 is feathered upon this's'haft and is normally held inith'e positio'n "shown by 'a coil spring 15 which bears against a thrustcol,- lar 16, the latter resting against a small shoulder near thecentero f the shaft and at one end offth'e enlarged portion 13. Theclutch member 14: carries a pin 17 which is adapted to engage any one ofthe openings 18 in the gear '9, A clutch shifter 19 is mounted on ashaft 20 and efiord means of engaging the pin 17 with one ofjthe holes18 of the gear '9, the shaft '20 passing through the forward portion ofthe base and being provided witha treadle 21 which, when depressed rocksth'e fshaft 2O 'and 'eng'ages the clutch. Rollers '22 are providedon-then per end of the arms of the shifter 19 to reduce the frictionbetween the parts. The clutch member 14 carries flange 23 which has twopockets 2i'for ined in to receive a rollerv 25 carried by an arm 26.pivotally mounted as at to one vof the bearing members11,-the arm26extending to the rear of the machine and embracinga 28 the latter beingmounted bearingsf2 9 and 30, and being provided with a fixed collar 31adjacent the bearing 30. Between the collar 31 a d v et ri 12 x e sie rnsfiQ is 'niel dtflie d' be ngln vide W ta i. n nanut3 hble ri lth-eatoward the left compressing the springifi and permitting the parts torotate until's'uch ich bears st the time as the pin either become fullyengaged with the gear or the next pocket 24 comes opposite the roller25, whereupon the spring 32 would return the roller to the position ofFig. 3.

The spring 32 and its leverage as' applied to the roller is considerablystronger than the spring 15 and would overcome the latter on occasionswhen any interfering action between the two springs might beestablished.

The cranks 12 carry connecting rods and these connecting rods engage ashaft 35 which carries a pair of cross-heads 36, one at each side of themachine and guided by ways 37 formed in the side plates 2.

Each cross-head 36 carries a pair of rods 38 which extend upward throughsuitable bearings 39 in a roof-shaped cross member 40, the upper ends ofthe rods 38 engage-the stripping member ll which normally lies withinchannels formed by the grids of the member 3, the shape of the member lis such that it will freely pass up and oown within the mold as theshaft 10 rotates.

Some of the grid members which form the member 3 are provided withprojecting ribs 42 which terminate at the upper surface at the member 3and upon which the platen 4L3 rests, the platen being shaped to nearlyfit the pocket portion of the mold and being preferably made ofcomparatively thin metal such as sheet metal or malleable casting.

The gear 9 carries an eccentric 4st (Fig. 1) and apump comprising acylinder 42 and a piston 4-3' is mounted so that the piston is operatedby the eccentric 44: when the gear rotates, the machine being made sothat the base will hold a quantity of lubricating oil, the pump beingprovided with a suction element 4%, Fig. 2 and a discharge pipe 4-5which leads, as shown in Fig. 1 to the side of the machine and upwardand then to the center and is connected to a distril'iutor 46.

The distributor 46 comprises ahorizontal trough portion which terminatesat each end in a pair of angularly arranged troughs which extend to andembrace the rods 38 a short distance below the bearing 39 and betweenthese bearings and the terminations of the angularly arranged troughs.absorbent washers 47 are mounted which not only serve to distribute thelubricant on the rods but also to keep these rods in a clean condition.ateral branches 48 extend from the distributor 46 and terminate todistribute a portion of the oil onto the ways 37 of the cross-heads 36.Small holes 49 are drilled in the distributor to divert portion of theoil and drop it upon the shaft 35 from which the oil in turn drops uponclutch mechanism and roller and other parts, before described, as willbe readily apparent. The operati n of the mac ne is for lows; 1

raw

Assuming that the parts are all assembled as shown in the drawings andthe machine is in place and connected so that power may be applied tothe shaft 7, and a platen is in place-within the mold. The mold isfilled with concrete or other material from which the block or otherproduct is to be made, and the material properly tamped and the uppersurface of the block struck off, the operator presses the pedal 21 downcauses the disengagement of the clutch and the consequent stopping ofthe shaft, the engagement of the roller 25 with the pocket 24: affordinga sufficient lock to hold the parts of the machine against accidentalmovement.

After the block and platen have been removed a new platen is placed uponthe stripping plate 42 and the pedal 21 again pushed downward. Thisagain causes the engagement of the clutch and the shaft 10 makes anotherhalfrevolution, lower the platen to the proper place for the formationof the next block and places the parts again in the position shown inthe drawings. Meanwhile the gear 9 is continuously rotating and itseccentric is constantly operating; the pump to supply oil to thedistributor 46 to lubricate all the parts of the machine which do notdip into the oil in thebase 1.

It might sometimes happen that in causing the engagement of the clutch,and espe cially after the edges of the holes become worn, the gear mightstart to rotate the clutch member before the pin 17 is fully engaged andto prevent injury to the. parts, the yielding mounting for the roller 25is provided so that upon partial engagement of the pin 17 the clutch 14can make its half revolution or if the lead is great enough to cause thepin to slip out of its partial engagement, the pin will be held tightlyagainst the face of the gear until the next hole comes opposite it,whereupon the spring 32 will snap the pin into engagement to com pletethe half revolution of the shaft.

As shown more clearly in Fig. 2, front and rear plates 50 are attachedto the machine to complete the enclosure of the mechanism to excludeddust or concrete or other foreign matters from the interior of themachine and to keep the oil in proper condition.

wh it is de ired to change from one When the shaft 10 has made size orshape of block to another, the grid element 3 and the parts which itcarries, are removed from the top of the machine and a new equipmenthaving the proper mold arrangement is substituted. Such a change wouldbe required in changing from concrete blocks to concrete bricks or fromone style of block to another.

A machine built as herein shown and described is comparatively simpleand easy to construct and assemble and is exceedingly efiicient inaction, operates without jar or noise and Starts its stripping action ata slow rate of speed, accelerates toward the center of the stroke andslows down as it reaches the upper end of the stroke so that the blockis raised from the machine without damage, or crushing it, or injuringit in any way and leaving the operators hands free for other dutiesduring the time the ma chine operates.

Having thus fully described my invention I claim:

1. In a stripper the combination of a frame, a mold carried thereby, astripping member movable within the mold, a crank shaft and connectionsfor moving the stripping member, power operated driving mechanism forthe crank shaft, and clutch connections between the power operateddriving mechanism and the crank shaft whereby when the clutch is engagedthe crankshaft will be rotated to impart one stroke to the strippingmember and then the clutch will be disengaged.

2. In a stripper the combination of a frame, a mold carried thereby, astripping member mounted for movement within the mold, a crank shaft,reciprocating crossheads moved by the crank shaft, rods be tween thecross-heads and the stripping memher, a driving member loosely mountedon the crank shaft, a clutch between the driving member and the crankshaft, means for engaging the clutch, and means for maintaining theclutch in engagement until the completion of a stroke of the strippingmember.

3. In a stripper the combination of a frame, a mold carried thereby, astripping member movable in the mold, a'power operated driving means forthe machine, a clutch for connecting the power means to move thestripping member, and means for maintaining the clutch in engagementuntil the completion of a stroke of the stripping member.

4:. In a stripper the combination of a frame, a mold carried thereby, astripping member movable in the mold, a power operated driving means forthe machine, a clutch for connecting the power means to move thestripping member, and yielding means for maintaining the clutch inengagement until the completion of a stroke of the strip ping member.

5. In a stripper the combination of a frame, a mold carried thereby,astripping member movable in the mold, a power operated driving meansfor the machine, a clutch for connecting the power means to move thestripping member, and yielding means for maintaining the clutch inengagement until the completion of a stroke of the stripping member,said yielding means holding the parts in proper relation until the nextengagement of the clutch.

6. In a stripper the combination of a frame, a mold carried thereby, astripping member movable within the mould, power operated drivingmechanism mounted in the frame and for moving the stripping member, ahousing over the driving mechanism for excluding foreign matters and toretain lubricant, reciprocating rods moved by the driving mechanism andpassing through the housing to move the stripping member, a crank shaft,connections between the crank shaft and the reciprocating rods,intermittently movable driving connections for the crank shaft, a meansfor maintaining the engagement of the driving connections until thecompletion of a stroke of the stripping member and then causing thedisengagement of the driving connections.

CHARLES S. EMERT.

